This can be played on any terminal or your Pip-Boy but will only affect turrets with a "hardline" to the terminal you are using. For example, in the Corvega assembly plant you can only hack the turrets from Jared's terminal, which will only affect the internal turrets.

In the test map Terminals & holotapes, o my! you can find the Turret_override.exe holotape, which operates identical to the turret override program, but has a more clean and polished interface, looking more like a professionally made program rather than a hacker's custom program.